Legal pluralism is the existence of multiple legal systems within one (human) population and/or geographic area. Plural legal systems are particularly prevalent in former colonies, where the law of a former colonial authority may exist alongside more traditional legal systems (cf. customary law). When these systems developed, the idea was that certain issues (e.g., commercial transactions) would be covered by colonial law, while other issues (e.g., family and marriage) would be covered by traditional law. Over time, these distinctions tended to break down and individuals would choose to bring their legal claims under the system that they thought would offer them the best advantage.